Not 100 % effective: While more effective that not taking anything, no birth control is 100 % effective. Sometimes changes in the metabolism of hormones due to changes in liver function can result in less than 100 % effectiveness. Use of antibiotics can also change effectiveness.
Answered 4/1/2014
4.3k views
9 doctors weighed in across 3 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question